Konstanz, Lake Constance weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: May – September
What is the weather like in Konstanz, Lake Constance in September?
In September, Konstanz, Lake Constance is mild: daytime highs average 19 °C, and nights cool down to about 13 °C. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 95 mm in total. All in all, September is a good month for a holiday in Konstanz, Lake Constance.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 72 | 71 | 51 |
| Day | 23° | 19° | 15° |
| Night | 16° | 13° | 8° |
| Sun | 8 h | 6 h | 3 h |
| Rain days | 15 | 12 | 12 |
More details for September
- Daylight
- 12 h 39 min06:59 – 19:38
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 12 km/haverage daily peak
- Cloud cover
- 62 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Berlin
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %42 %
- Few rainy daysweight 30 %41 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in September
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Konstanz, Lake Constance in September: quick answers
Is Konstanz, Lake Constance hot in September?
No. In September, Konstanz, Lake Constance is mild: daytime highs average 19 °C and nights drop to about 13 °C.
Does it rain much in Konstanz, Lake Constance in September?
Rain is frequent, with about 12 rainy days and 95 mm in total.
Konstanz, Lake Constance month by month
The whole year in Konstanz, Lake ConstanceAll destinations: GermanyWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)